package com.itheima.reggie.service.Category.Impl;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.Category.CategoryMapper;
import com.itheima.reggie.service.Category.CategoryService;
import com.itheima.reggie.service.Dish.DishService;
import com.itheima.reggie.service.Setmeal.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService service;
    /**
     * 根据 id 删除分类
     * @param ids
     */
    @Override
    public void remove(Long ids) {
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        //添加查询条件 根据 id 进行查询
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,ids);
        int count1 = dishService.count(dishLambdaQueryWrapper);
        // 查询当前分类是否关联了菜品 如果已关联,抛出一个业务异常
        if (count1 > 0){
            //已关联菜品,抛出一个业务异常
            throw new CustomException("当前分类下关联了菜品, 无法删除");
        }
        // 查询当前分类是否关联了套餐 如果已关联,抛出一个业务异常
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        //添加查询条件 根据分类 id 进行查询
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,ids);
        int count2 = service.count(setmealLambdaQueryWrapper);
        if (count2 > 0){
            //已关联套餐,抛出一个业务异常
            throw new CustomException("当前分类下关联了套餐, 无法删除");
        }
        // 正常删除分类
        super.removeById(ids);
    }
}
